Brake Pad Dust Deposits contamination on surface before laser cleaning
Alessandro Moretti
Alessandro MorettiPh.D.Italy
Laser-Based Additive Manufacturing
Published
Dec 16, 2025

Brake Pad Dust Deposits Contamination

Brake-dust contamination, it emerges from frictional wear of steel, aluminum, and cast iron during braking processes, forming adherent particulate layers that accumulate on surfaces. This residue, distinguished by its metallic tenacity and uneven distribution—which resists dislodgement more than organic dusts—behaves variably: on cast iron it embeds deeply, dependent from surface porosity, while on aluminum it manifests as thinner films, posing challenges like potential scratching in mechanical removal. Laser cleaning addresses these effectively, as the process vaporizes the particles selectively through targeted ablation, which preserves substrate integrity without residue recurrence.

Safety Information

Critical safety data for laser removal operations

Fire/Explosion Risk
low
Toxic Gas Risk
low
Visibility Hazard
moderate

Required Personal Protective Equipment

Respiratory Protection
PAPR
Eye Protection
goggles
Skin Protection
full_suit

Hazardous Fumes Generated

CompoundConcentrationExposure LimitHazard ClassStatus
Iron Oxide (Fe2O3)5-25 mg/m³5 mg/m³irritant✓ Within Limit
Copper0.5-3 mg/m³0.1 mg/m³irritant✓ Within Limit
Zinc Oxide1-8 mg/m³2 mg/m³toxic✓ Within Limit
Carbon Black3-15 mg/m³3.5 mg/m³carcinogenic✓ Within Limit
Polycyclic Aromatic Hydrocarbons (PAHs)0.1-1.5 mg/m³0.2 mg/m³carcinogenic✓ Within Limit

Ventilation Requirements

Air Changes Per Hour
12
Exhaust Velocity
0.5 m/s
Filtration Type
HEPA

Particulate Generation

Respirable Fraction
70%
Size Range
0.1 - 10 μm

Substrate Compatibility Warnings

  • High laser power may damage underlying metal surface
  • Thermal stress may cause micro-cracking in cast iron components
  • Avoid prolonged exposure on thin-walled brake components